EM-1359
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Do not remove the amplifier cover, since the amplifier contains
precision devices. Doing so may cause malfunction or failure.
5. On-board amplifier
5.1 Appearance of the on-board amplifier
NULL Adjuster
This trimmer is used to adjust the neutral position of the
valve spool. It is set by default. If neutral position
adjustment is required for the load conditions, remove
the protective screw (M5) and turn the trimmer behind
the screw. After adjustment, be sure to attach the
protective screw. The adjustment range is about ±15%.
Indicator Lamp
●
Power Supply (Green)
Lights up when the valve is powered on.
●
Deviation Alarm (Red)
Lights up when the spool travel deviates about 3% or more from the input value and does not
follow the input signal for one second or more.
5.2 Wiring
NULL Adjustment Range
Input Signal
Valve Spool Travel
Rated
Travel (+)
Rated
Travel (-)
CAUTION
Connect the earth
wire independently to
the earth terminal of
the control panel.
If necessary, take
measures against AC
power noise, such as
inserting a noise filter.
Use a stabilized power supply
dedicated to the valve.
Recommended power capacity:
75 VA or more.
Valve
AC Power Supply
DC Power Supply
Input Signal
Input (+)
Input (-)
Spool Travel Monitoring
COM